Ice surfaces dictate energy usage in skating rinks because they are the largest heat exchangers in the building. This study aimed to improve the concrete material used in ice rinks to maximize the performance of their refrigeration systems. The TPS method measured the thermal conductivity and thermal diffusivity of the improved concrete using the Transient Plane Source (TPS) method. Results indicated that adding iron ore to the concrete might improve ...
This study aimed to determine the thermal conductivity of gas-filled Metal Organic Framework (MOF) materials. Glass beads were used as the reference material, and nitrogen (N2) and helium (He) were added to the MOF materials. A TPS instrument measured the thermal conductivity of the MOF samples using the Transient Plane Source (TPS) method. Results showed that the MOF materials containing copper had higher thermal conductivities than iron-filled materials, and the ...
It is important that porous metal foams used in gas turbines do not exceed their upper temperature threshold. In this paper, the Transient Plane Source (TPS) technique was used to measure the thermal conductivity of metal foams up to 1000 °C. Results showed that the thermal conductivity values for porous metal foams were lower than dense metals by a factor of 20-40....
Clathrates are thermoelectric materials that are used in waste heat recovery applications. This study tested the thermophysical properties of the n-doped clathrate Ba8Ga16Ge30 after gallium (Ga) and germanium (Ge) substituted antimony (Sb) and zinc (Zn). A TPS instrument measured the thermal conductivity of n-Ba8Ga16Ge30 with the transient plane source (TPS) method. Results showed that for almost every sample, thermal conductivity decreased inversely to temperature, then increased ...
Thermally conductive nanoparticles are often added to conventional fluids to improve thermal properties. In this paper, the effect of small concentrations of multiwalled carbon nanotubes (MWCNTs) on thermal conductivity over a range of temperatures was tested. A Thermal Constant Analyser measured the thermal conductivity of the nanofluids with the transient plane source (TPS) method from 10 to 80 °C. Results showed that thermal conductivity of the nanofluids increased with temperature, and with ...
